Alert archive / Texas / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 101, NWS Fort Worth, TX

May 20, 2010Erath County, Hood County, Somervell County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at May 20, 2010, 5:55 AM CDT for Erath County, Hood County, Somervell County, Texas. It was in force for 65 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
May 20, 2010, 5:55 AM CDT (10:55 UTC)
Expired
May 20, 2010, 7:00 AM CDT
In force
65 min
Issued by
NWS Fort Worth, TX
Area
Storm-based polygon

Counties Erath County, TX, Hood County, TX, Somervell County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 67 km from the middle of the area, began a volume at 10:55 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 10.9 hours before the alert went out and 329 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Norman, OK at 00:00Z on 2010-05-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1598 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Norman, OK at 00:00Z on 2010-05-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 259 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1598 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
954 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
259 m²/s²
0-3 km storm-relative helicity
410 m²/s²
Significant tornado parameter
2.8
Supercell composite
18.7

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Fort Worth, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at May 20, 5:21 AM CDT, 34 minutes earlier.

Area forecast discussion, May 20, 5:21 AM CDT, 34 minutes before
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Hazardous weather outlook, May 20, 4:04 AM CDT, 1 hour 51 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE FORT WORTH TX
404 AM CDT THU MAY 20 2010

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-211130-
MONTAGUE-COOKE-GRAYSON-FANNIN-LAMAR-YOUNG-JACK-WISE-DENTON-COLLIN-
HUNT-DELTA-HOPKINS-STEPHENS-PALO PINTO-PARKER-TARRANT-DALLAS-
ROCKWALL-KAUFMAN-VAN ZANDT-RAINS-EASTLAND-ERATH-HOOD-SOMERVELL-
JOHNSON-ELLIS-HENDERSON-COMANCHE-MILLS-HAMILTON-BOSQUE-HILL-NAVARRO-
FREESTONE-ANDERSON-LAMPASAS-CORYELL-BELL-MCLENNAN-FALLS-LIMESTONE-
LEON-MILAM-ROBERTSON-
404 AM CDT THU MAY 20 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH TEXAS.

.DAY ONE...TODAY AND TONIGHT.
THERE IS A CHANCE OF THUNDERSTORMS ACROSS ALL OF NORTH TEXAS
TODAY. SOME OF THE STORMS MAY BE SEVERE...PRODUCING LARGE HAIL
AND DAMAGING WINDS. SOME OF THE STORMS WILL ALSO PRODUCE LOCALLY
HEAVY RAINFALL THAT MAY RESULT IN FLASH FLOODING. THUNDERSTORMS
WILL END FROM WEST TO EAST LATE THIS AFTERNOON AND EVENING.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.
NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION MAY BE REQUESTED NORTH OF A COMANCHE TO
PALESTINE LINE THIS MORNING...AND MAINLY ALONG AND EAST OF THE
I-35 CORRIDOR THIS AFTERNOON INTO EARLY EVENING.

In the hours before

Special weather statement, May 20, 4:39 AM CDT, 1 hour 16 minutes before
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The office that day

Everything else NWS Fort Worth, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 20, 4:39 AM CDTSpecial Weather StatementFWDEastland36 min
May 20, 5:05 AM CDTSevere Thunderstorm WarningFWDEastland, Erath55 min
May 20, 6:49 AM CDTSevere Thunderstorm WarningFWDJohnson56 min
May 20, 7:53 AM CDTSpecial Weather StatementFWDEllis37 min
May 20, 8:54 AM CDTFlash Flood WarningFWDLamar111 min
May 20, 11:21 AM CDTSpecial Weather StatementFWDFannin24 min
May 20, 11:31 AM CDTSpecial Weather StatementFWDTarrant29 min
May 20, 12:15 PM CDTSpecial Weather StatementFWDDallas30 min
May 20, 12:40 PM CDTSevere Thunderstorm WarningFWDHopkins47 min
May 20, 12:41 PM CDTSpecial Weather StatementFWDTarrant34 min
May 20, 12:51 PM CDTAreal Flood AdvisoryFWDHopkins, Hunt3 hr
May 20, 12:51 PM CDTSevere Thunderstorm WarningFWDDallas, Tarrant54 min
May 20, 12:58 PM CDTTornado WarningFWDHopkins28 min
May 20, 1:03 PM CDTAreal Flood AdvisoryFWDDallas3 hr
May 20, 1:41 PM CDTSevere Thunderstorm WarningFWDDallas64 min
May 20, 2:06 PM CDTSevere Thunderstorm WarningFWDEllis, Kaufman54 min
May 20, 2:07 PM CDTTornado WarningFWDEllis38 min
May 20, 2:43 PM CDTTornado WarningFWDEllis47 min
May 20, 2:54 PM CDTSevere Thunderstorm WarningFWDHenderson, Kaufman66 min
May 20, 3:23 PM CDTAreal Flood AdvisoryFWDEllis112 min
May 20, 3:28 PM CDTSevere Thunderstorm WarningFWDEllis, Navarro62 min
May 20, 3:45 PM CDTTornado WarningFWDEllis, Navarro45 min
May 20, 3:55 PM CDTSevere Thunderstorm WarningFWDHenderson65 min
May 20, 4:25 PM CDTTornado WarningFWDNavarro38 min
May 20, 4:28 PM CDTSevere Thunderstorm WarningFWDEllis, Navarro47 min
May 20, 5:00 PM CDTSevere Thunderstorm WarningFWDNavarro60 min
May 20, 5:00 PM CDTSevere Thunderstorm WarningFWDAnderson, Henderson, Navarro60 min
May 20, 5:11 PM CDTTornado WarningFWDAnderson, Freestone, Henderson, Navarro49 min
May 20, 5:14 PM CDTSevere Thunderstorm WarningFWDEllis46 min
May 20, 5:19 PM CDTTornado WarningFWDFreestone, Navarro41 min
May 20, 5:38 PM CDTSevere Thunderstorm WarningFWDHill52 min
May 20, 5:43 PM CDTTornado WarningFWDAnderson, Freestone, Navarro47 min
May 20, 5:58 PM CDTSevere Thunderstorm WarningFWDNavarro62 min
May 20, 6:19 PM CDTSevere Thunderstorm WarningFWDBosque56 min
May 20, 6:24 PM CDTSevere Thunderstorm WarningFWDAnderson46 min
May 20, 6:29 PM CDTSevere Thunderstorm WarningFWDHill61 min
May 20, 6:40 PM CDTSevere Thunderstorm WarningFWDFreestone, Limestone65 min
May 20, 6:41 PM CDTTornado WarningFWDHill, Limestone, Navarro49 min
May 20, 6:47 PM CDTSpecial Weather StatementFWDHamilton28 min
May 20, 6:58 PM CDTTornado WarningFWDFreestone32 min

Nearby

Severe Thunderstorm Warnings in Texas, 2010Every severe thunderstorm warning in 2010

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.